Help, please....

Hi,
I'm having trouble with my sister's pc. I'm unable to surf the net even though the connection is fine. I suspected its infected with spywares. Any help is greatly appreciated. Thx in advance.Here is the hjt log:-

The following file may be left over from malware, get rid of it in HJT.
O2 - BHO: iMeshBar BHO - {5345A7A1-805A-4923-B505-86B2FEBA3FE0} - C:\Program Files\iMeshBar\bar\2.bin\IMESHBAR.DLL

Download Ewido, and scan your computer with it. You can download a trial version of Ewido here: http://www.ewido.net/en/

Be sure you update it before using it, and when it finds a problem, be sure to select the check box to do the same action (clean) when it finds a problem, otherwise, you will have to click continue, to keep scanning with every problem it finds.